package com.by.common.util;

import java.security.MessageDigest;

import com.alibaba.druid.util.StringUtils;
import com.by.common.conf.WxConfMager;
import com.by.common.cont.WxConst;

/**
 * 采用MD5加密解密
 */
public class MD5Utils {

	/**
	 * MD5加码 生成32位md5码
	 */
	public static String string2MD5(String inStr) {
		MessageDigest md5 = null;
		try {
			md5 = MessageDigest
					.getInstance(WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_SIGN));
		} catch (Exception e) {
			System.err.println(e.toString());
			e.printStackTrace();
			return "";
		}
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; i++) {
			byteArray[i] = (byte) charArray[i];
		}
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16)
				hexValue.append("0");
			hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();
	}

	/**
	 * 加密解密算法 执行一次加密，两次解密
	 */
	public static String convertMD5(String inStr) {

		char[] a = inStr.toCharArray();
		for (int i = 0; i < a.length; i++) {
			a[i] = (char) (a[i] ^ 't');
		}
		String s = new String(a);
		return s;
	}

	public static String generateMD5SignString(String renter_id, String room_id, String timestamp) {
		String sign = null;
		if (!StringUtils.isEmpty(renter_id) && !StringUtils.isEmpty(room_id) && !StringUtils.isEmpty(timestamp)) {
			sign = renter_id
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ room_id
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ timestamp
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_MD5_HASH_RENTER_ROOM_TIMESTAMP_SIGN_APPID)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_MD5_HASH_RENTER_ROOM_TIMESTAMP_SIGN_APPKEY);
			sign = string2MD5(sign);
		}

		return sign;
	}

	public static String generateMD5SignConvert(String renter_id, String room_id, String timestamp) {
		String sign = null;
		if (!StringUtils.isEmpty(renter_id) && !StringUtils.isEmpty(room_id) && !StringUtils.isEmpty(timestamp)) {
			sign = renter_id
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ room_id
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ timestamp
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_MD5_HASH_RENTER_ROOM_TIMESTAMP_SIGN_APPID)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_HASH_RENTER_ROOM_TIMESTAMP_STRING_SEPARATOR)
					+ WxConfMager.getProperty(WxConst.WX_OFFICIAL_CLUSTER_MD5_HASH_RENTER_ROOM_TIMESTAMP_SIGN_APPKEY);
			sign = convertMD5(sign);
		}

		return sign;
	}

}
